chore: migrate from ESLint/Biome to oxlint/oxfmt

- Replace ESLint with oxlint (1.52.0) - 50-100× faster
- Replace Biome with oxfmt (0.37.0) - 3-30× faster
- Remove dependencies: @biomejs/biome, @biomejs/js-api, @biomejs/wasm-nodejs, @eslint/compat, @eslint/js, eslint, eslint-plugin-*, typescript-eslint, globals
- Add dependencies: oxlint@1.52.0, oxfmt@0.37.0 (exact versions)
- Update lint.mjs script to use oxlint/oxfmt
- Update test.mjs script to use oxlint
- Replace @eslint/compat includeIgnoreFile with simple gitignore parser
- Generate .oxlintrc.json from eslint.config.mjs using @oxlint/migrate
- Generate .oxfmtrc.json from biome.json using oxfmt --migrate
- Remove old config files: .config/eslint.config.mjs, test/npm/eslint.config.mjs, biome.json
- Apply oxfmt formatting to all files (139 files reformatted)

All tests passing. Performance significantly improved for linting and formatting operations.

Author: jdalton

.config/eslint.config.mjs

@@ -0,0 +1,38 @@
+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "useTabs": false,
+  "tabWidth": 2,
+  "printWidth": 80,
+  "singleQuote": true,
+  "jsxSingleQuote": false,
+  "quoteProps": "as-needed",
+  "trailingComma": "all",
+  "semi": false,
+  "arrowParens": "avoid",
+  "bracketSameLine": false,
+  "bracketSpacing": true,
+  "singleAttributePerLine": false,
+  "ignorePatterns": [
+    "**/.cache",
+    "**/.claude",
+    "**/.DS_Store",
+    "**/._.DS_Store",
+    "**/.env",
+    "**/.git",
+    "**/.github",
+    "**/.husky",
+    "**/.type-coverage",
+    "**/.vscode",
+    "**/coverage",
+    "**/dist",
+    "**/node_modules",
+    "**/package.json",
+    "**/pnpm-lock.yaml",
+    "packages/npm/**/build",
+    "packages/npm/**/package",
+    "perf/**/fixtures",
+    "scripts/templates",
+    "test/**/fixtures",
+    "test/**/packages"
+  ]
+}